{"affected":[{"defaultStatus":"unaffected","product":"openemr","source":"CNA: VulnCheck","vendor":"openemr","versions":[{"lessThan":"8.4.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"8.4.0","versionType":"semver"}]}],"cveId":"CVE-2026-124484","cwes":["CWE-862"],"description":"OpenEMR before 8.4.0 contains a missing authorization vulnerability in portal onsite-document APIs that allows any authenticated core user to access cross-patient documents. Attackers can omit the patientId parameter and supply arbitrary record IDs to list, read, and overwrite other patients' portal documents, signatures, and template data.","epss":{"date":"2026-11-12","percentile":0.15979,"score":0.00246},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/openemr/openemr/security/advisories/GHSA-4r76-rq83-hgpg"}],"kev":null,"metrics":[{"score":8.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":8.8,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},{"score":8.7,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":8.8,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1794540603619,"publishedAt":1794143762837,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-4r76-rq83-hgpg"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openemr-before-8.4.0-missing-authorization-in-portal-onsite-document-apis"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-4r76-rq83-hgpg"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-4r76-rq83-hgpg"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/openemr-before-8.4.0-missing-authorization-in-portal-onsite-document-apis"}],"remediation":[],"revision":"0b7317bb6a8626dec90b414cf9c0130ab1dd2fab9502cca312ea91be8513f998","sources":[{"modifiedAt":1794540603619,"name":"CNA: VulnCheck","retrievedAt":1794542944277,"url":"https://www.cve.org/CVERecord?id=CVE-2026-124484"},{"modifiedAt":1794347189807,"name":"NVD","retrievedAt":1794356377846,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124484"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794542961198,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-124484"}],"ssvc":{"assessedAt":1794540578978,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"OpenEMR before 8.4.0 Missing Authorization in Portal Onsite-Document APIs","updatedAt":1794542961198}